Three of a Kind (Red)

Draw 3 cards. Until end of turn, you may only play cards from arsenal.

Go again

"Finally. Time to take out the trash." - Azalea

Rulings

From the Arcane Rising release notes

You still need to pay the cost and action points to play cards out of your arsenal.
You cannot play any cards except cards from arsenal, this includes cards from hand, banished zone or deck.
The restriction applies to all card types. You cannot play instants or attack reactions unless they are played from your arsenal.
You may still activate cards, such as weapons, equipment, hero abilities, and items.

Keyword notes

Go again - Go again allows multiple actions to be played in a turn when usually playing an action with use up your action point, and therefore end your turn. A card with go again gives the controller of that card or activated ability 1 action point when it resolves.

When an action with go again resolves, its controller gains 1 action point.
Multiple instances of go again on the same card or activated ability do not stack. If a card or activated ability has multiple instances of go again when it resolves its controller gains 1 action point only.
If an action with go again does not resolve, its controller does not gain 1 action point.
You cannot reveal a card with no to Belittle. The card must have a value to its power that is 3 or less. (0 is a value)